donneley



2 Sheets-Sheet 1.

A. DONNELEY] FURNACE FOR STEAM BOILERS.

(No Model.)

(No Model.) 2 Sheets-Sheet 2.

A. DONNELEY.

FURNACE FOR STEAM BOILERS.

No. 323,124. Patented July 28, 1885.

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ADOLPH DONNELEY, OF HAMBURG, GERMANY.

FURNACE FOR STEAM-BOILERS.

SPECIFICATION formin part of Letters Patent No. 323,124, dated July 28, 1885.

Application filed June 7, 1884. (No model.) Patented in Germany July 1, 1883, No. 25,313; in France July 24, 1883, No. 156,107; in

Belgium August 8, 1883, No. 62,264, and March 28, 1884, N0. 64,664; in England September 24, 1883, No. 4,559, and in Austria- Hungary December 13, 1883, No. 35,205 and No. 53,454.

To all whom it may concern:

Be it known that I, ADOLPH DONNELEY, of Hamburg, in the Empire of Germany, have invented a new and useful Improvement in Furnaces for Steam-Boilers, of which the following is a description, reference being had to the accompanying drawings.

My invention relates to furnaces for steamboilers which are provided, in lieu of ordinary grate bars, with basket like grates, wherein a large and deep body of fuel is contained, and through which fuel the atmospheric air passes to the heatingsurfacc of the boilers.

My invention consists in the combination, with a steam-boiler, of a passage or conduit external to the boiler and communicating with the heating fines or surfaces thereof, and an upright basket extending across the passage or conduit and composed of two series of bars, and provided at the top with a feeding mouth or hopper external to the boiler. This basket is to be kept nearly or quite full of fuel by feeding from the top, and the fuel burns from the bottom. One or both series of bars will preferably be tubular, and will communicate at top and bottom with channels or passages communicating with the water-space of the boiler, and the entrance of air between the bars of the front or outermost series may be controlled or regulated by two or more horizontal rows of pivoted bars, which may be adjusted to close more or less of the spaces between the bars of the front series. These fca turcs are also included in my invention.

In the accompanying drawings, Figure l is I a front elevation'of a horizontal boiler having my improved furnace applied thereto, both series of bars being tubular. Fig. 2 is a horizontal section thereof. Fig. 3 is a plan thereof, the feeding-hopper being removed. Fig.

4 is a sectional view similar to Fig. 2, but showing the back series of bars only as tubular or hollow. Fig. 5 is a sectional viewsimilar to Fig. 2, but also showing the frontseries of tubular bars as having pivoted between them supplemental bars, which may be adjusted to more or less close the spaces between the bars of the front series. Fig. 6 is a front elevation of a part of the basket shown in Fig. 5, and Fig. 7 is a horizontal section of a part of the front series of tubular bars.

Similar letters of reference designate corresponding parts in all the figures.

G designates-a part of a boiler, (here shown as of the horizontal type,) and having a heating-flue, G. At the front of the boiler is a passage or conduit, G transversely across which is arranged the fire-basket or fuel-receptacle. This basket or receptacle is substantially upright, and is formed by two series of bars, a b, which converge toward their lower ends, and at the top of the basket is a feeding month or hopper external to the boiler. As here shown, a hopper, T, is fitted to the top of the basket; but this hopper is removed in Fig. 3 to more clearly illustrate the parts below. The bars of one or both series are tubular, or consist of tubes. As shownin Figs. 1, 2, and 8, 5, 6, and 7, the bars a b of both series are tubular; but in the example of the invention shown in Fig. 4 only the bars I) of the back series are tubular. The lower ends of the tubular bars are fixed in a transverse channel or passage, H, from which a pipe, on, leads to the water-space of the boiler, and the upper ends of the tubular bars are fixed in one or more channels or collectors, p, which is or are connected by a pipe, 1), with the water-space of the boiler, as best shown in Fig. 3. The active circulation of water through the tubular bars not only heats the water, but it also prevents the tubular bars from beingsoon burned out by the fire. The basket or receptacle is to be kept full or nearly full of fuel by replenishing it at the hopper or feeding-mouth at the top thereof, and the fuel burns fromthe bottom upward. The sides of the basket or receptacle are closed by the side walls of the passage or conduit G in which are doors k, providing for the removal of ashes or clinkers to clean the basket or receptacle. The space between the bars a of the front series is ample for the entrance of air to support combnstion, and the gases and hot products of combustion pass from the basket or receptacle (as indicated by the arrows, Fig. 2) into the heating-flue G, and from thence through the other flues or tubes, or in contact with other heatingsurfaces.

In order to regulate the fire it may be desirable to provide means for closing more or less of the space between the bars a of the front series, and in Figs. 5, 6, and 7 I have shown short bars cl, arranged in three rows, extend ing across the basket or receptacle, one above another, and hinged opposite the spaces between the bars at. These supplemental bars (I may then be swung outward, like those of the lower row in Fig. 5, to admit air freely to the basket or receptacle; or they may be closed or shut against the front of the basket or receptacle, like the middle and upper rows of bars in Fig. 5, so as to close the spaces between the bars a.

Vhat I claim as my invention, and desire to secure by Letters Patent, is-

1. The combination, with a boiler and a passage or conduit external thereto and communicating with the heating fines or surfaces thereof, of an upright basket extending across the passage or conduit and composed of two series of bars, and provided at the top with a feeding mouth or hopper external to the boiler, substantially as herein described.

2. The combination, with a boiler and the passage or conduit leading thereto, of the upright basket extending across the passage or conduit and composed of two series of bars, some or all of which are tubular, a feeding mouth or hopper at the top of the basket, and channels or passages in which the upper and lower ends of the tubular bars are fixed, and which communicate with the waterspace of the boiler, substantially as herein described.

3. The combination, with a boiler and the passage or conduit leading thereto, of an upright basket extending across the passage or conduit and composed of two series of bars, a feeding mouth or hopper at the top of the basket, and supplemental bars d, hinged at the front of the basket and adjustable to more or less close the space between the bars of the front series, substantially as herein described.

ADOLPH 'DONNELEY.

\Vitnesses:

F. ENGEL, F. OLAIRMONT. 

